Laser-assisted single-point diamond turning of fused silica convex asphere

Hossein Shahinian; Charan Bodlapati; Robert Turnbull; Jayesh Navare; Yuxiang Zhong

doi:10.1117/12.2602342

28 October 2021 Laser-assisted single-point diamond turning of fused silica convex asphere

Hossein Shahinian, Charan Bodlapati, Robert Turnbull, Jayesh Navare, Yuxiang Zhong

Proceedings Volume 11889, Optifab 2021; 1188916 (2021) https://doi.org/10.1117/12.2602342
Event: SPIE Optifab, 2021, Rochester, New York, United States

Abstract

This paper reports on the possibility of single point diamond turning (SPDT) of an axisymmetric convex aspherical fused silica lens. Due to the relatively abrupt tool wear during SPDT of fused silica, generally the process is not considered to be commercially acceptable. Surfaces created with SPDT are very rough and of no optical functionality. That said the SPDT can be a very convenient method in production of fused silica asphere and freeform optics should the process be amenable to producing relatively smooth surfaces. In this article it is shown that a lens fabricated via conventional fine grinding processes can be SPDT'ed to roughness values below 100 nm RMS and surface form better than 800 nm PV.

Conference Presentation

Citation Download Citation

Hossein Shahinian, Charan Bodlapati, Robert Turnbull, Jayesh Navare, and Yuxiang Zhong "Laser-assisted single-point diamond turning of fused silica convex asphere", Proc. SPIE 11889, Optifab 2021, 1188916 (28 October 2021); https://doi.org/10.1117/12.2602342

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